Add JS promise test, optimize V8/QuickJs event loop handling #239

Job	Run time
windows-msvc-run (V8, Debug)	1m 49s
ubuntu-gcc-run (V8, Debug)	47s
windows-msvc-run (V8, Release)	1m 56s
ubuntu-gcc-run (V8, Release)	1m 16s
windows-msvc-run (JavaScriptCore, Debug)	2m 0s
ubuntu-gcc-run (JavaScriptCore, Debug)	48s
windows-msvc-run (JavaScriptCore, Release)	1m 25s
ubuntu-gcc-run (JavaScriptCore, Release)	1m 15s
windows-msvc-run (Lua, Debug)	1m 21s
android-clang-build	0s
ubuntu-gcc-run (QuickJs, Debug)	52s
windows-msvc-run (Lua, Release)	2m 19s
ubuntu-gcc-run (QuickJs, Release)	1m 47s
windows-msvc-run (Empty, Debug)	2m 9s
node-gcc-run (14.x)	31s
ubuntu-gcc-run (Lua, Debug)	45s
windows-msvc-run (Empty, Release)	1m 59s
node-gcc-run (15.x)	30s
ubuntu-gcc-run (Lua, Release)	1m 18s
node-gcc-run (16.x)	36s
ubuntu-gcc-run (Empty, Debug)	37s
node-gcc-run (18.x)	55s
ubuntu-v8-versions-build (0/8)	3m 51s
ubuntu-gcc-run (Empty, Release)	1m 9s
ubuntu-v8-versions-build (1/8)	4m 3s
ubuntu-v8-versions-build (2/8)	4m 7s
mac-clang-run (V8, Debug)	40s
ubuntu-v8-versions-build (3/8)	4m 5s
mac-clang-run (JavaScriptCore, Debug)	39s
ubuntu-v8-versions-build (4/8)	4m 14s
mac-clang-run (QuickJs, Debug)	39s
mac-clang-run (Lua, Debug)	45s
ubuntu-v8-versions-build (5/8)	4m 17s
mac-clang-run (Empty, Debug)	49s
ubuntu-v8-versions-build (6/8)	4m 12s
ubuntu-v8-versions-build (7/8)	4m 20s
webassembly-emscripten-run (3.0.0)	53s
webassembly-emscripten-run (3.1.33)	58s
	1h 6m 36s

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